Gas discharge lamp ballast



FIG. 1 is a perspective view of a gas discharge lamp ballast showing our new design;

FIG. 2 is a right side elevational view thereof;

FIG. 3 is a bottom plan view thereof; and,

FIG. 4 is a rear elevational view thereof.

The broken lines in FIG. 1 are included for the purpose of illustrating environmental structure only and form no part of the claimed design. 

The ornamental design for a gas discharge lamp ballast, as shown and described. 